.popBox{width: 500px;height: 250px;background: ;position: absolute;left: 30%;border: solid 5px #477dc5;}
.popBox .tit{position: absolute;top: 0;background: #477dc5;width: 100%;height:15%;line-height:35px;}
.popBox span{position: relative;left: 15px;display: block;float: left;}
.popBox .closeBtn{display: block;float: right;position: relative;right: 15px;}
.popBox .content{width: 100%;background: red;position: absolute;height: 100px;bottom: 0;height: 85%}